| Project/Area Number |
25420588
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Building structures/Materials
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| Research Institution | Tokai University |
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Principal Investigator |
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| Project Period (FY) |
2013-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2015: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2014: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2013: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | スロッシング / 石油タンク / 浮屋根 / シングルデッキ / ポンツーン / 面外変形 / 一次モード / 液深 |
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| Outline of Final Research Achievements |
This study investigates the behavior of the first mode resonance in the liquid storage tanks with the single-deck type floating roof. In the Tokachi-Oki Earthquake in 2003, the floating roof of the large-sized oil tanks received damage by sloshing. One of the reasons is considered to be out-of-plane deformation of the pontoon by the first mode resonance in the past report. In this paper, the behavior of the floating roof is simulated by the proposed numerical analysis method, and the deformation and stress in the pontoon are investigated in detail. The stress of the pontoon calculated by the design method notified by the Fire Defense Agency is compared with the numerical results. By these results,it was found that stress is underestimated because the design method does not take into consideration the influences of liquid depth and deck tension. An improved design method in consideration of the influence was proposed.
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